Cardinal River Energy Company is a diversified energy company that was founded in 1987 in Oklahoma City, Oklahoma. Through its various affiliates, the company is engaged in oil and gas exploration and production, gas gathering and processing, energy related acquisitions, energy financing, and other energy related businesses.

From its beginning as a non-operator that participated in third party prospects, the company now develops and operates its own prospects, and retains up to a 100% working interest in its wells. The company operates over 2,500 wells in Oklahoma and Kansas, and owns both operated and non-operated interests in over 3,500 wells located in Oklahoma, Kansas, Texas, Arkansas, Kansas, New Mexico, Mississippi, Louisiana and Illinois.  Through its affiliates, the company also owns and operates over 2,000 thousand miles of gathering pipelines and related assets in Oklahoma and Kansas.